Crossword Genius

Swinger is one moaning, naked (5)

Ross

I believe the answer is:

hinge

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'swinger' is the definition.
(I've seen this in another clue)

I don't understand how the rest of the clue works.

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(Other definitions for hinge that I've seen before include "Joint on which something turns" , "Circumstance upon which subsequent events depend; door facilitator" , "Pivotal point" , "Device for letting door etc swing" , "Moveable joint" .)

I've seen this clue in The Independent.
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